﻿<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

    <script src="http://www.jq22.com/jquery/1.7.2/jquery.min.js"></script>

    <style type="text/css">

        body {

        font-size:12px;

        }

        #scroll {

        position:fixed; top:300px; right:100px;

        }

        

        .scrollItem {

        width:20px; height:70px;border:#e1e1e1 1px solid; cursor:pointer; text-align:center; padding-top:10px;

        }

    </style>

    <script type="text/javascript">

        $(function () {

            var speed = 800;//滚动速度

			var h=document.body.clientHeight;

			

            //回到顶部

            $("#toTop").click(function () {

			  	$('html,body').animate({

					scrollTop: '0px'

				},

				speed);			

            });

            //回到底部

            var windowHeight = parseInt($("body").css("height"));//整个页面的高度

            $("#toBottom").click(function () {

				//alert(h);

                $('html,body').animate({

					scrollTop: h+'px'

				},

				speed);

            });

            



        });

    </script>



</head>

<body>

    <div style="height:1000px;"></div>

    <p id="liuyan">这里是留言位置，回到这儿来额</p>

    <div style="height:1000px;"></div>

    <div id="scroll">

        <div class="scrollItem" id="toTop">回到顶部</div>

        <div class="scrollItem" id="toBottom">回到顶部</div>

    </div>

</body>

</html>

